Power-transmitter.



f 0. L. oofscH & A. A.YACIKERMAN, 1n.

POWER TRANSMITTER.

APPLICATION ,FILED NOV. 30| |915.

Patented Dec.` 148, 1917..

`3SHEETSSIIEIT 2.

o. 'LfnosCH & A. A.- ACKERMAN.; 1n.. mwen mAN'sMlTIER.

APPLICATION- FILED IIOV. 30. 1915. y 1,250,438. vPatented Dee 18, 1917.

w a j w y3 SHEETvSHEET 3- INVENTORS UNITED .STATES PATENT OFFICE.

OLIVER L. BOSCH AND ALBERT A, ACKERMAN, JR., F ELIZABETH, NEWVJEBSEY, "ASBIGNORS T0`THE SINGER MANUFACTURING COMPANY, A CORPORATION 0F NEW JERSEY.

To 'all whom it ma concern- "Be it known t at We, OLIVER Dosen and ALBERT. A. ACKERMAN, Jr., citizens of they 'United States, residing at Elizabeth, in

the count-y. -of'Unionand State of New Jersey,- have-invented certain new 'and useful Im rovernents .in Power-Transmitters, of. Vwhichthe following is a. specification, reference being had therein to the accompanyin drawings.

his invention relates to an improvement in ower transmitters f'desi ed more parflou arly for use in connection with power tables sustaining a number of sewing machines or other lightfriinning machines re- Vquired to be driven independently from a common Isource of power such as maybe derived from a driving shaft extending len hwise Vof and beneath the top of the tab e, as represented, for instance, in the -V United States patent to Herbert Corrall No. 1,147,377, of July 20, 1915. It .has for Vits object to provide a simple, compact and eiiicient construction of such a transmitter Which shall be inexpensive to manufacture land which shall readily adapt itself to the power-shaft with the exercise of a minimum of care and yskill in its installation. A

In itsy preferred form, the transmitter comprises a hanger whichmay be composed of a standard alfording a vertically adgustable upper section of -a leg of the powertable and'suitably recessed to embi'ace the moving parts, this standard having secured 85 and vertically a segmental support having Iupon its inner edge circumferentially spaced thereto for.v adjustment ,both horizontally seats in spherical arrangement to receive the #correspondingly formed adjacent portion of a' closed casing containing the clutch-memlbers of the transmitter and -secured thereon for universal adjustment by means of suitable bolts.

The transmitter casing is preferably constructed of general cylindrical form with axially separable parts formed respectively with' interengaging internal land externalv screiv-threads atfordng 4means of relative axial adiustment.

@ne of the parts of the hanger is formed with a bearing boss containing a rotary end-v wise-movable bushin in which is journaled the tubular hub or s eeve of a friction-disk constitutiiig one section of Va driven clutchmemher and apertured to-receive peripher- Specication of Letters Patent. I

4clutch-dis which'fisvsecured therein by aA set-screw lor ).10

POWER-TRANSMITTER.

` member which is sustained b and is spaced from and is axially movab e relatively to the tirst-named section. The other part of Patented Dee. 18, 191 '7.4

Application tiled November 30, 1915. Serial No. 64,248.

the transmitter-casing has a` bearing in which is journaled a sleeve upon which s slidingly mounted by a spline-and-groove connection a disk or Wheel, constituting the driving clutch-member,'which is disposed intermediate the component sections ofthe driven clutch-member in operative relation with which its opposite faces are respectively disposed.

The bearing bushing for the driven clutchanember, which constitutes a part of one of the transmitter-casing sections, receives the thrust of one of the driven clutchmeinber sections in a clutching action, the thrust of the other clutch-member section being sustained by the other relatively adjustable `part of the casing, and between these thrust-receiving portions of the casing and the respective clutch-member sections are preferably' interposed anti-friction bearing rings to reduce the frictional resistance of the movable members when in operative engagement.

The rotary bushing preferably has in its i periphery an inclined cam-slot entered by a 'roller stud -pro]ect1ng inwardly from the surrounding bearing-boss.y and such bushing has adjustably secured thereon a collar provided with a lateral arm connected with a treadleor knee-lever rod by which such v bushing isturned to perform slight endwise -movements for forcing the adjacent driven clutch-member sect-ion toward-the Vother section and thereby frietionally gripping the driving clutch-member between them.

` The part of the transmitter-casing provided with the movable bushing preferably has a concentric stationary braking element against which the adjacent driven clutchmember section may be forcibly drawn 1n the retraction of the bushing to disengage the clutching, elements, the bushing preferably being at its outer end in abutting relation with the hub ot' a belt-wheel xed upon the driven clutch-member sleeve for commun-icating power trahsmitted through the clutch to the machine to be driven. i

'The supporting'4 sleeve 'for the drivin r -is entered by the power-sha t side elevation of the upper portion of the Y ments.'

other suitable means. In vcase the transmitter is used singly oris at the end of a series of such transmitters, the driving shaft need extend only partly through thesleeve in which it is secured; -but the transmitter may be'applied to the shaftin any part of' its length, in which case the shaft passes through both the sleeve 'of lthe driving clutch-member and the hub or sleeve of the driven clutclmnember. In either case the transmitter is entirely self-contained and sustains not only the weight of its moving parts but the axial thrust thereof in the vdriving and braking actions, so that the sole function of the driving shaft is to communicate rotary movement to the driving clutchmember.

According to the present construction, as thus described,- 'the clutching parts of the transmitter -are entirely housed within the casing for exclusion of foreign matter which would impair their etliciency and durability, while they are effectively shielded from the operator. The belt-wheel for communicating power to the machine to be driven is4 preferably inclosed within a dress-guard removably attached to the casingsupport ,and is provided with a socket in which `may be secured a tube affording a housing for lthe rotary driving shaft, the bearing boss at the 'opposite end of the transmitter-casing 'being provided with acollar having a. similar socket to receive an oppositely extending housing tube for the driving shaft. In the drawings, Figure 1 is a sectional leg of a power table sustaining a power transmitter embodying the present improve- Fig. 2A is an end elevation of the same, ornitting the dress-guard and the pulley belted to the machine to be driven. Fig. 3 is an end elevation of the transmitter with the casing in section and certain of the contained parts omitted. Fig. 4 is a detail view of the movable bearing bushing and the stud entering its cam-groove. Fig. 5 is an elevation, upon a smaller scale, of an entire leg of the power-table sustaining 'the power transmitter, and showing a portion of the table-top in transverse section.y Fig. 6 is a side elevation of thesame with the table-top omitted, and Fig. 7 aplan of the parts represented in Fig. 6.'

The transmitter-casing is shown constructed with a body section 1 ofgeneral cylindrical form With-one end portion 2 re- -duced and rounded intosubstantially spheri'cal-form-and the other end formed with an axial-aperture of approximately its fullV diameter which isinternally screw-threaded to receive the externally screw-threaded capsection 3, forming therewithl a substantially closed cavity to afford a housing for the .clutching parts of the transmitter.

' .The cap-Section 3 is provided with a tustud-pins 23 entering the similarly disposed hub of the friction-disk lbular boss' 4 within which is fitted the tubu lar sleeve or arbor- 5 having at its outer end the collar 6 and in itsinner end ortion the longitudinal roov'e'or key-way Within the groove? 1sfitted the spline 8 which is 7'0 secured Within a groove of the inner periphery of the hub 9 of the driving disk or wheel 10 slidingly mounted upon said sleeve, the spline being provided with a projecting pin 11 entering a radalaperture of the hu 9 to lock it in position within'the latter. The driving disk 10 is provided with annular recesses in its opposite faces .to receive .the laterally projecting frictionerings 12 of soft material such as leather.

Within the bearing bf 13 of the transmitter-casing section 1 is fitted the rotary and endwise-movable bushing 14 Which-is provided in its periphery with the inclined cam-slot 15 entering by the roller 16 upon the stud 17 projecting inwardly from the bearing boss. Oscillatory movements of the bushing 14 cause the bushing to perform slight endwise movements within its bear-v ing boss 13.

-Journaled within the bushing 14 is the tubular hub or sleeve 18 of the clutch-disk 19 constituting one of the component sections of the driven clutcli-member, the other section consisting of the clutch-disk 20 which is formed with peripherally spaced lugsl 2 1 having threaded apertures into which are' tapped the similarly threaded ends 22 of the asl ois-

tubular bosses Q1 of the disk 19 by means of which the disk Q0 is sustained for rotation with but axial movement relative to the disk 19.- The component sections of the driven'A member are axially spaced to embrace 'the driving disk 10, and are normally forced apart out of driving engagement with the friction-rings 1:2 means of the springs 25 interposed between the lugs Q1 and the. bosses 24. Y

The inner face of the cap 3 is adapted to receive the thrust of the hub of the frictiondisk 20 in a clutching action, and between these parts preferably introduced a thrustbearing of well-known form, comprising a ring 26 having circularly spa-ced sockets containing the anti-friction balls 27 projecting slightly beyond the opposite faces of saidI ring and preferably resting in contact. with the wearing rings 28 and 29 disposed upon opposite sides of the ring- 26. Between the 19 and the adjacent end of the 4bushing 11 is preferably introduced a similar thrust-bearing comprising the ring 30 containing the circularl)1 spaced anti-friction balls 31 adapted to Vcontact with the wearing rings' and 33 on opposite sides thereof` the latter beingr shown set in a suitable recess in the end of the bushing.

The closed` end of the transmitter-casing Section 1 is shown formed with an inwardly,

iso

extending annular flange 34 recessed in its inner face to receive the soft friction-rin 35 which is opposed to the adjacent face 0 the.

disk 19 and normally engages the same to serve as a brake forthe driven clutch-member when the latter is disengaged from the driving clutch-member. The sleeve 18 1s shown formed near its outer end With an annular groove 18 Within which is fitted the hub 36 of a split beltswheel 37 which is `peripherally grooved to receive the belt 38 connecting such pulley with the machine to be driven, the separable parts of the belt-wheel being secured together by means of the bolts 39 passing through suitable' lugs of the hub 36. By the means described, the bushing 14 is locked between the clutch-disk19 an the hub of the belt-Wheel, so that its endwse movements are communicated to said parts. The power-shaft 40 which in practice usually extends throughout the length of the power-table, passes through the sleeves 5 .and`

- 18 of the driving and driven clutchanembers and is secured within the former by means of the set-screws 4l passlng through the collar 6 and preferably engaging flatted por-` tions of the shaft 40.

The bearing boss 13 of the transmittercasing section 1 is shown provided With an annular cavity 42 having arlateral opening 43. Secured upon the bushing 14 Within this cavity is the split collar 44 clamped in posi,- tion upon the bushing by means of the screw 45 and formed with a lateral arm 46 extend ing through the opening 43 and provided at its outer end with an aperture entered by the treadleor knee-lever rod 47 which is preferably formed witha head '48 intermediate which and the arm 46 is interposed the, buffer-spring 49, a thrust-collar'O being secured upon the rod 47 by means of the setscrew 51 to confine the parts together. The operating rod 47 may be normallyithrust upwardly by means of the usual spring to turn the bushing 14 into normal retracted posi-4 tion in which the clutchsdisk A19 is Withdrawn from engagement with the driving disk 10 and is pressed against the brake element 35 to maintain the belt-ivheel 37' sta* tionary. Then the operator moves the treadleor knee-lever to draw the rod 47 down- Wardly, a regulated yielding pressure is imposed upon the arm 46 through the buiferspring 49 to. move the bushing 14 toward the driving disk 10, thereby forcing the disk 19 in opposition to the springs Q5 into engagement with the driving disk 10, and shifting the latter in turn into engagement with the disk 20. as represented' in Fig. 1, whereby the axially movable driving 'member is gripped between the axially separable Sections of the driven member, and driving relation between them is established.

It is evident that the degree of pressure between the clutching elements of the transmittel' is under complete control by theop erator, so that any speed of the driven'melnber may be readily atta-ined up to a"`m`afx'i` mum determined by the speed ofthe driving shaft 40. It is'rurther evident thatin the reverse movement of the rod 47 to stop the machine, not only may the clutch-members be forcibly shifted, but the retractive force may be determined by the operator, so as to produce any desired degree of pressure be- Atween the driven member and the braking element to effect either a gradual or abrupt sto )page of the machine to be driven.-

s the friction elements become worn, the separable sections of the casing may be adjusted by turning the cap-section 3 to vary the distance apart of the .respective endthrust resisting Walls, the end cap beinglse#V cured in its position of adjustment bv means of the setscrew 52 introduced Within a threaded aperture of the Casin section 1 and bearing upon a soft-metal p ug 53 rest ing upon the threaded periphery of the cap The ends of the twosections of the transmitter-casing are preferably formed with outwardly flaring annular oil cavities 54 and 55 entered by the similarly formed flanges 56 and 57 upon the hubs of the disks 19 and lar grooye 18 of the sleeve 18 and con. neoted vvlth the oil-cavity7 54 by means of the downwardly inclined duct 61 for insuring against the escape of oil from the bushin".

The bearing boss 4 is similarly provided with an annular lubricantcavity 4 connected with its bearing face by .means of distributing apertures 4". The boss 4 has preferably secured thereon a collar 62 having in its upper face the lubricant-cavity' preferably containing a suitable packing saturatedivith oil, and communicating with. the cavity 4 by means of an aperture 64. The collar 62 is split at its outer end and provided with the apertured lug 65 entered by the clamp-screw 66 toclamp the apertured end of such collar upon the split housing tube 6.7 extending to the adjacenttransmitter or to the end of the table for shielding the operator `from the .driving shaft.

The spherical exterior 2 of the body section of the transmitter-casing rests upon the similarlyl formed faces of the circularly spaced bearing seats 68 of a segmental supporting plate '69 formed with apertures 70 adjacent said seats to receive the Shanks of screw-bolts71 tapped into correspondin spaced lateral lugs 1 of the casing section 1, conical-faced .washers 72 being preferablyinterposed between the heads of the studbolts and correspomlingly shaped countersinks at the outer ends of the apertures 70. Snttcient clearance is provided between the stud-bolts 71. and the walls of the apertures TO to 'permit slight lateral play ot the latter 1n relatively atjusting the lugs 1 toward and from the support 09 to producea slight universal angular adjustmentl ot the casing and the movable parts contained therein.

The supporting plate 09 is shown provided with lateral lugs T3 having in their upper edges notches or recesses 7+ entered by cIamp-lmIt-s which pass through suitable `flanges 76 of the dress-guard T7 open at the .lop and incasing the pulley-wheel 37 to shield the operator from the belt-wheel 37 and belt 3S. which are omitted from Fig. to expose the parts behind the same. The

uard T7 may be readily removed b v merely ws'ening the. nuts ot' the boltl T5 so that in lifting the guard from operative position the bolts may be raised outof the notches 74. The guard 'T7 is shown provided with a splitbearing boss 7S in which is clamped one er-.d of a s plit housing,1r tube GT serving at the opposite end of the. transmitter a purpose similar to the tube G? in inclosing the drivshaft. 40.

. he lugs 'T 3 of the supporting plate 69 are formed with elongated 'vertically extending apertures 7 9 entered by clamp-bolts S0 having their heads S1 suitably eountersunk and passing through transverse elongated apertures S2 formed in the laterally spaced members. 83 of a standard Si constituting the upper section of a table-leg comprising the f straight lowersection S5.

The section S5 is formed near its upper end with a slot SG entered b v the clamp-bolt -87 passing through a similar slot SS of the section Sl for securing the. parts together for relative vertical adjustment. Tapped into a suitable boss` S9 at the bottom of the standard Slis the adjusting bolt 90 whose head rests upon the lateral lug 91 ofthe legi section S5. the Vtwo parts of the leg being relatively.adjustable vertically b v means of the bolt 90 to 'which is applied the j am-nut 92.

The members S3 of the standard Sl/'a're formed witlrseats 93 at the topsa-nd with the divergently projecting extensions 9i and 95 -respectively. each formed at its upper 'extremity with the seat 96. teSecured upon the extension 95 is `a strip 97 upon which and the seat otthe opposite extension 9i' rests a table-top section formedof the separate parts 9S, 99 and 100. The partsQS and 100 have secured. thereto the depending rails 101 which are la tei-ally notched to 'receive 'the lateral tongues 99 of the part 99. (Fig. 5). Theparts 9S and 100 are seein-ed in position b v means of a transverse cleat 102 and bolts 103 passing through the same andthe rails -oi the present improvement.

101, bolts 104 passing through the cleat 102 and the table-parts 09 serving 'to hold the latter against endwise displacement;

The power-table to which the present improvement is shown applied is of that type comprising legs or standards spaced apart lengthwise of the table and connected together in pairs transversely thereof by means of-sultabl'e cross-braces, the tabletop being formed of sections extending longitudinally above the component pairsof said legs or standards a'nd each adapted tosupport -one or more sewing machineswith an intermediate work-supporting section; but a complete table is not shown herein, as the table construction as a whole forms no part lVhile the power-transmtter is herein shown and described in its preferred ein-- bodiment, it is evidently adapted for matcrial modification of thc construction and arrangement of its parts within the scope ot a hanger, driving anddriven clutch-niem bers journaled therein. one of said clutchmembers being constructed with axially sep-v arable sections and the other being axially movable and disposed intermediate and in operative relation with thecomponent sec` tions of the first-named member, and means t'or effectingsimultaneously the' power-transmitting engagementof both of the separable clutch-member sections with the. intermediate member.

2. In a power transmit-ter, in combination. a hanger, driving and driven clutchmembers journaled upon independent normally stationary supports of said hanger, one of said clutch-members being constructed with axially separable sections and the other being axially movable and disposed inter mediate and in operative relationwith the component` sections ofthe first-named member, and means for eecting simultaneously the power-transmitting engagement of both of the separable clutclrmember sections with the intermediate member.

3l In a power transmitter. in combination, a hanger, a driven clutch-member journalcd therein and constructed `with axially separable sections ot'which one is movable toward and from theot-her. a driving clutchmember also journaledf within and axially movable relatively to said hanger and disposed intermediate and in voperative rela? tion with thefseparable sections of the driven clutcli-iueinbcr. and means applied to the movable clutch-member section for forcing it intooperative engagement with the driving clutch-member and the-driving clutchmembcr into operatii-'e engagement withl the other section ofthe driven clutch-member.

Y clutch-memben movable and .disposed intermediate and in operative 'relation with the wcomponent seoally separable sections of 74. In a power transmitter, in combination, a hanger, driving and driven clutchinembers iournaled therein, one of said clutch-members being constructed with axi- Which one is journaled in said hanger and itself affords a support for the other section, and lthe other clutch-member being also journaled within saidhang'er and disposed intermediate and in operative relation with the separable sec-y tions' of the first-named clutch-member, a spring' for maintaining the clutch-member sections normally separated, and manually operated means acting in opposition to said spring for imposing a variable and regulated pressure oi the component sections of one clutch-,member upon the other clutchmember intermediate the same.

5'. In a poiver transmitter, in combination.y a hanger comprising axially separable parts. drivingr and driven clutch-members each mounted upon a diiierent one of said separable parts of the hanger` one of said clutchmembers being constructed with axially `separable sections and the' other being axially movable and disposed intermediate and in operative relation with the component sections of the first-named member, and means for effecting simultaneously7 the power-transmitting engagement of both of the separable clutch-member sections with the intermediate member.

6. In a power transmitter. in combina- 4 tion, a hanger comprising axially separable parts forming between them a closed cavity,

- driving and driven clutch-members arranged within said cavity and eachmounted upon a different one of said separable parts of the hanger, and means controlled from the eX- terior of said cavity for effecting the operative engagement of said clutch-members.

7. In a power transmitter. in' comblnation, ahanger, driving and driven clutchmembers journaled tlierein.fone of said cluteh-members being constructed with axially separable sections and the other being axially movable and disposed intermediate and in operative relation with the component. sections of the First-named member, axially spaced thrustbearings 'embracing between them and adapted for engagement with the component sections ofthe driven and means applied togone of said thrust-bearings for forcing together into driving ,relation said clutch-member sections and the intermediate clutch-member. 4 S. In a power transmitter, in combination. 'a hanger provided `With 'a brake' element, driving and driven clutch-members journaled in said hanger, one of sald clutchmembers being arable sections and. the other being axially .-dispo ed intermediate and in operative rela-- and upon ,which constructedwith axiallysep.-4

- tions of the first-named member, and manually operated means for moving one of said clutch-member sections in one direction to establish driving'relation of the driving and driven members and in the opposite 'direction to force it into operative `relation Withsaid brake'element. g

9. In` a power transmitter, in combination, a hanger, driving and drivenclutchmembers journaled therein, one of said clutch-members being constructed with axially separable sections and the other being axially movable and disposed intermediate and in operative relation nent sections of the first-named member,

with the compocontrolling means for effecting simultaneously the power transmitting engagement of both of the separable clutch-member sections ivith the intermediate member, means sustained by said hanger for receiving the thrust imposed upon the clutch-members by said controlling means, and a driving shaft operatively connected with said 4driving clutch-member and relative to which saio lclutchPmember is adapted to'perform axial movements.

10. In a power transmitter, in combination, a hanger, a drive-n clutch-member journaled the-rein and constructed n 'ith axially separable sections, a driving clutch-member disposed intermediate and in operative relation with the separable sections oi' the driven clutch-member, a sleeve journaled in said hanger lindependently ofthe driven member and affording a 'support for4 the driving clutch-member with which it is connected forgotation, and means for effecting simultarnectsly the power-transmitting engagement of the driving clutch-member wlth both sections ofthe driven clutch-member.

V11. ln a power transmitter, in combination, a hanger, a driven clutch-*member journaledt herein and constructed with axially separL le sec-tions, a driving clutch-member tion-'\v1tl1'the separable sections of the driven clutch-member, a sleeve journaled in said hanger independent-.ly of the driven member the driving clutch-memberV is splined for axial movement thereonavhile turning with the same, a driving shaft 'e'nter' ing and rigidly secured Within said sleeve, :y and means for eifecting simultaneously the power-transmitting engagement of the drive in clutch-memberwithboth sections of the driven clutch-member. i

12"y "a, power transmitter, in vcombina-4 nger comprisingJ axially adjustable ',rable partsg-"d'riving 4and ldriven 'embers jour-na ed ,ltherein, one of. h-me'mbers" b cpnstructedjwith p'd the other beat 1 member,

ally mo intermedition- ".ffh the coml axially spaced thrust-bearings embiiaei-ng between them and adapted -'or'eng'agement vviththel component sections offthe. iijstnamed clutch-member, and means'- for/.eife'ct- 'lng 1 simultaneously the power-transmitting engagement of both of the separable clutch member sections with the intermediate l clutch-member.

13. In a power-transmitter,in combination, a hanger comprising separable .parts adjustably connected by inter-engaging internal'a'nd external screw-threads.foi-ined in or upon the respective parts, driving and driven clutcl'r-membersv each mounted upon a different one of said s parable parts of the hanger, lone of said c atcb-members being constructed with axially separable sections and the other being axially movable and dis-` posed intermediate and in operative relation with the component. sections of ythe firstnamed member, axially spaced thrust-bear ingssustainedI by the respective separable parts of the hanger and embracingbetwe'en them and adapted .for engagement with the` component sections ofthe first-named clutchmember7 and meansconnected with one'of` said thrust-bearings for forcing said clutchmember sections into engagement with theV intermediate `clutch-member.

1 4. In a power transmitter, in combination, a hanger comprising a supporting member and a bearing member mounted thereon by a universal-joint connection, driving and driven clutclrm'embers journaled vvithin said bearing member, means for establishingpand interrupting operative engagement betweenthe driving and, driven ,clutch-members, and a'shaft entering said bearing member'gnd connected to oneof. 4said clutch-members which ali'ords a support therefor.- 4

15. In a'power transmitter. incombination, a hangercomp'rising sup-portingy member provided .Withfla sustantially sphericaljseat, and #a bearing membe-r-1itted externally to said seatfwithmeans'for'securing it adjustably thelj'eemldriving anddrivenvclutch-men'ibers nurna-led Within :said-bean ing member. means 'for-' establishingfandinterrupting operatiye f engagement y between the driving and driven jc-lutch-inembers, and

a shaft entering saidfbeaigingmeinber isoconnected to one Vof Achitch-Iriembers which affords a support ftlllrerje'itor.

16. 1n a power transmitterg; in'coinbine.

tion, a hanger' comprising astanda'rdffa sup-y porting member with means for-#Securing it adjustably, vertically and horizontally connection.. `driving and drivenclutch-inembers journaled within said-bearing member, means for establishing andvinterrupting opL4 erative engagement between the .driying and driven clutch-members, and ashaft enter-I ing said bearing member and connected to .one of said clutch-members which affords va support therefor.

In testimony whereof, We'liave signed our Y names to this specification,

. OLIVER.- L. Dosen.

ALBERT A. ACKERMAN, JR.

thereon, and a bearing member'mountd-uponsaid support-ing member by univrsalfjoint- 

